用于从水溶液中去除六价铬的氧化石墨烯/壳聚糖/铁氧体纳米复合材料的制备。
Preparation of graphene oxide/chitosan/ferrite nanocomposite for Chromium(VI) removal from aqueous solution.
机构信息
School of Environmental Science and Engineering, Indian Institute of Technology, Kharagpur, West Bengal 721302, India.
Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal 721302, India.
出版信息
Int J Biol Macromol. 2018 Nov;119:540-547. doi: 10.1016/j.ijbiomac.2018.07.052. Epub 2018 Jul 31.
A magnetically modified graphene oxide/chitosan/ferrite (GCF) nanocomposite material was synthesized and exploited for removal of Chromium(VI) from aqueous solution. The GCF nanocomposite material was characterized by powder-X-ray diffraction (powder-XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope- energy dispersive X-ray (SEM-EDX) analysis, transmission electron microscopy (TEM) thermogravimetric analysis (TGA), UV-vis diffusive reflectance spectra and Brunauer-Emmett-Teller (BET) analysis. The effect of pH, adsorbent dose, contact time and initial Cr(VI) metal ion concentration were studied in batch process. The GCF nanocomposite material showed an adsorption capacity of 270.27 mg g for Cr(VI) at pH 2.0. The adsorption mechanism of GCF adsorbent material was well described by Langmuir isotherm and pseudo second order kinetic model, with a high regression coefficient (<0.99). The results have shown that GCF nanocomposite material can be used as a suitable adsorbent for removal of Cr(VI) from wastewater.
一种磁性修饰的石墨烯氧化物/壳聚糖/铁氧体（GCF）纳米复合材料被合成并用于从水溶液中去除六价铬。GCF 纳米复合材料通过粉末 X 射线衍射（粉末 XRD）、傅里叶变换红外光谱（FT-IR）、扫描电子显微镜-能量色散 X 射线（SEM-EDX）分析、透射电子显微镜（TEM）热重分析（TGA）、紫外可见漫反射光谱和 Brunauer-Emmett-Teller（BET）分析进行了表征。在批量过程中研究了 pH 值、吸附剂剂量、接触时间和初始 Cr(VI)金属离子浓度的影响。在 pH 2.0 时，GCF 纳米复合材料对 Cr(VI)的吸附容量为 270.27mg/g。GCF 吸附剂材料的吸附机制很好地描述了 Langmuir 等温线和拟二级动力学模型，具有较高的回归系数（>0.99）。结果表明，GCF 纳米复合材料可用作从废水中去除 Cr(VI)的合适吸附剂。
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